Betty Johnson Cram was born September 18, 1922 on a farm near Niwot, Colorado. After high school she moved to Denver and worked several jobs. In 1941, she found work at the Livestock Exchange Group. She remained there for several years, working...

Interior view of the boiler room at the Colorado School of Mines in Golden (Jefferson County), Colorado. Shows a brick faced furnace with steel doors, an automated coal hopper powered by a pulley system, a conveyor for the coal, and individual...